*{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box; }
body, html
{
    padding: 0;
    margin: 0;
    height: 100%;
    font-family: "Helvetica Neue",Helvetica Neue,Helvetica,Arial,Hiragino Sans GB,Microsoft Yahei,sans-serif;
    font-size: 16px;
}
ul
{
    padding: 0;
    margin: 0;
    padding-left: 20px;
}
li
{
    padding: 0;
    margin: 0;
}
.loadingmask
{
    position: fixed; 
    top: 0px; 
    left: 0px; 
    right: 0px; 
    bottom: 0px; 
    background: url(loading.gif) no-repeat 50% 50%;
    background-size: 50px;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
}